(cheers and applause) 's >> tomorrow night, "after newtown" continues on pbs. first, nova investigates new theories about rampage killers, and asks, can science prevent another newtown? then, how can schools detect and deter potentially violent behavior? >> some of them are trailing a sign behind them saying, "i need treatment." >> "after newtown" continues with nova and "the path to violence" tomorrow on most pbs stations. >> go to pbs.org/frontline for exclusive photos of nancy and adam lanza, plus more of the interviews. >> kids were everything to her. >> adam had episodes. >> a web-exclusive report on e nssf, the gun lobby headquartered in newtown, plus more reporting from our partners at the hartford couraon newtown. follfrontline on facebook and twitter, or pbs.org/frontline. >> coming to pbs... >> i am a dakota from the spirit lake nation. >> a story of one woman, tryig to save herself and her family. >> i'm going to keep this family together. >> an intimate story of love.. >> i know that you want your dad, and i know that you miss him. >> loss... >> i c